i need some programming help

i need some help
on this website www.sgcarmart.com
can you tell whether they use php and mysql
do they use any database and why does the picture of the cars get changed randomly when the page is automatically refresh

Hello! Can you, please, help me submit my article? I can't do it myself because there's an error that occurred when I tried to do that. It is said that it was spam or an ad. How can I post the article? Thank you in advance.